Brake Proportioning/Combination Valve: Service and Repair

REMOVAL PROCEDURE

IMPORTANT: Do not wash the proportioning valve in any cleaning solution. The internal components are prelubricated with a special grease.





1. Raise and suitably support the vehicle.





2. Clean the dirt and foreign material from the brake pipes and proportioning valves.
3. Disconnect the brake pipe fittings from the proportioning valve using a backup wrench.
4. Remove the proportioning valves (1).

INSTALLATION PROCEDURE





1. Install the proportioning valves (1).

NOTICE: Refer to Fastener Notice in Service Precautions.





2. Connect the brake pipe fittings to the proportioning valve using a backup wrench.
- Tighten the proportioning valve tube nut to 15 Nm (11 ft. lbs.).

3. Lower vehicle.
4. Bleed the brakes.